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Interlocks & Guard Switches

Interlocks and Guard Switches (Industrial Machine Safety Interlocking)

Interlocks and guard switches are critical components in industrial machine safety systems. These devices monitor the position of safety gates, guard doors, and protective barriers to ensure machinery operates only when safe conditions are met. When a guard is opened or removed, the interlock switch signals the safety circuit to stop machine motion and prevent hazardous operation.

Industrial interlocks are widely used in automated production lines, packaging equipment, robotic cells, conveyors, and assembly systems. Using the correct interlock series ensures compatibility with existing machine guarding hardware and helps maintain reliable safety performance in demanding industrial environments.

This category includes refurbished interlock switches and guard monitoring devices used for maintenance replacement and spare inventory. Maintaining compatible replacement hardware allows facilities to repair machines quickly and minimize production downtime.

Typical interlock applications

  • Safety gate monitoring for robotic cells
  • Guard door monitoring on packaging equipment
  • Access control for automated production lines
  • Protective enclosure monitoring for hazardous machinery
  • OEM machine safety integration

Shop by interlock series

Related categories

When replacing an interlock device, verify mounting orientation, actuator compatibility, electrical connections, and application requirements before installation to ensure the safety system functions correctly.

  • Allen-Bradley 440NS32089 440N Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440NS32089 440N Interlock (Refurbished)

    About Allen-Bradley 440NS32089Product Overview Allen-Bradley 440NS32089 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $120.00
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  • Allen-Bradley 440NS32088 440N Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440NS32088 440N Interlock (Refurbished)

    About Allen-Bradley 440NS32088Product Overview Allen-Bradley 440NS32088 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $120.00
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  • Allen-Bradley 440N-S32056X 440N Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440N-S32056X 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32056XProduct Overview Allen-Bradley 440N-S32056X is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $330.00
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  • Allen-Bradley 440N-S32056 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-S32056 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32056Product Overview Allen-Bradley 440N-S32056 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $455.00
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  • Allen-Bradley 440N-S32055 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-S32055 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32055Product Overview Allen-Bradley 440N-S32055 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $20.00
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  • Allen-Bradley 440N-S32054 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-S32054 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32054Product Overview Allen-Bradley 440N-S32054 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $20.00
    Ask for Quote
  • Allen-Bradley 440N-S32053 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-S32053 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32053Product Overview Allen-Bradley 440N-S32053 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $20.00
    Ask for Quote
  • Allen-Bradley 440N-S32052 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-S32052 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32052Product Overview Allen-Bradley 440N-S32052 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $1,690.00
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  • Allen-Bradley 440NS32047X 440N Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440NS32047X 440N Interlock (Refurbished)

    About Allen-Bradley 440NS32047XProduct Overview Allen-Bradley 440NS32047X is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $420.00
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  • Allen-Bradley 440N-S32047 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-S32047 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32047Product Overview Allen-Bradley 440N-S32047 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $390.00
    Ask for Quote
  • Allen-Bradley 440NS32046X 440N Interlock (Refurbished)

    Allen-Bradley

    Allen-Bradley 440NS32046X 440N Interlock (Refurbished)

    About Allen-Bradley 440NS32046XProduct Overview Allen-Bradley 440NS32046X is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $20.00
    Ask for Quote
  • Allen-Bradley 440N-S32046 440N Interlock

    Allen-Bradley

    Allen-Bradley 440N-S32046 440N Interlock (Refurbished)

    About Allen-Bradley 440N-S32046Product Overview Allen-Bradley 440N-S32046 is a refurbished 440N safety interlock designed for industrial machine guarding and access control. It is commonly used to help prevent access to hazardous motion by monitoring...

    $420.00
    Ask for Quote
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